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SubjectRe: [PATCH 0/3] arm64: system call table generation for asm-generic
On Thu, Jan 03, 2019 at 09:10:22PM +0530, Firoz Khan wrote:
> This will be an automated scripts to provide easy support
> for add/modify/delete the system call entry by add in
> respective *.tbl file.
>
> System call table generation support for asm-generic is
> provide for arm64 architecture which will use the common
> scripts resides in scripts directory and use syscall.tbl
> syscall_arm32.tbl files as inputs. This implementation
> will replace asm-generic/unistd.h.
>
> This patch depends on:
> https://lore.kernel.org/lkml/1546439331-18646-1-git-send-email-firoz.khan@linaro.org/
> https://lore.kernel.org/lkml/1546520681-24453-1-git-send-email-firoz.khan@linaro.org/

I'm having a hard time understanding what the benefit of this series is,
given that we only support EABI compat tasks. When adding a new compat
system call, you can't just blindly hook it up without checking whether it
needs a wrapper to deal with any type conversion etc, so really we're just
replacing one table with another as far as I can tell. What am I missing?

I also really don't think we should be generating the 32-bit UAPI headers
from the 64-bit compat system call support (if that's what you're trying to
do -- make headers_check fails with your patches applied). arch/arm/ is the
canonical place for the 32-bit UAPI, and we're just implementing that.

Will

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